prefer losing than accept a draw in a drawish position

[MikeGL]

I don't know the reason for this funny draws, maybe these engines are
TOO optimistic, or maybe a proof that eval can be further tuned, or in
case of the second game posted below, kingsafety code in endgame
made the engine think it has advantage until it's too late to save the
game.



after GM Nakamura played 124. ... NxQ
[d]1b6/4kp2/p1p3p1/Pp1p1nPp/1P1PpP1P/2P1P3/K1R5/7R w - - 0 125

[Event "ICC blitz 3 0"]
[Site "Internet Chess Club"]
[Date "2008.03.15"]
[EventDate "?"]
[Round "-"]
[Result "0-1"]
[White "Rybka (Computer)"]
[Black "Hikaru Nakamura"]
[ECO "A00"]
[WhiteElo "?"]
[BlackElo "2697"]
[PlyCount "542"]

1. g4 d5 2. h3 h5 3. g5 g6 4. d4 Bg7 5. Nc3 c6 6. Nf3 Bf5
7. Nh4 e6 8. Nxf5 exf5 9. Bf4 Ne7 10. e3 O-O 11. Qd2 Nd7
12. O-O-O Re8 13. Bg2 Nf8 14. Be5 Ne6 15. f4 Nc8 16. Kb1 Nd6
17. Bf1 Qd7 18. a4 b6 19. Ba6 Nc7 20. Be2 a6 21. Bd3 b5 22. h4
Ne6 23. Ne2 Re7 24. Ka1 Ree8 25. Qa5 Nb7 26. Qd2 Nd6 27. Rh2
Bf8 28. Rf2 Ng7 29. a5 Nb7 30. Ng1 Qd8 31. b4 Qd7 32. Nf3 Nd6
33. Bxd6 Bxd6 34. Ne5 Qb7 35. Kb2 Rac8 36. c3 Re7 37. Be2 Ree8
38. Bf3 Re7 39. Qc2 Rd8 40. Rfd2 Bb8 41. Be2 Re6 42. Bd3 Re7
43. Rf2 Re6 44. Qd2 Re7 45. Rg1 Re6 46. Rff1 Re7 47. Qd1 Re6
48. Rg2 Re7 49. Qc2 Re6 50. Rfg1 Re7 51. Rf2 Re6 52. Qe2 Re7
53. Qf3 Re6 54. Rd2 Re7 55. Rgd1 Re6 56. Qg3 Re7 57. Kb1 Re6
58. Bc2 Re7 59. Nd3 Re6 60. Nc5 Qc8 61. Nxe6 Qxe6 62. Kb2 Re8
63. Re1 Qd7 64. Qf3 Re7 65. Bd3 Re8 66. Rg2 Re7 67. Kb3 Re8
68. Ra2 Re7 69. Rc1 Re8 70. Rca1 Re7 71. Rg1 Re8 72. Rh2 Re7
73. Qg3 Re8 74. Ka3 Re7 75. Rb1 Re8 76. Rd2 Re7 77. Kb3 Re8
78. Ra1 Re7 79. Kb2 Re8 80. Re2 Re7 81. Ree1 Re6 82. Qf3 Qe7
83. Qf2 Qe8 84. Be2 Qe7 85. Bd1 Qe8 86. Bf3 Qe7 87. Qd2 Qe8
88. Kb3 Qe7 89. Kc2 Qe8 90. Kb2 Qe7 91. Rab1 Kf8 92. Qf2 Ke8
93. Be2 Kd8 94. Bd3 Qe8 95. Qf3 Ke7 96. Kb3 Kf8 97. Ra1 Qe7
98. Bc2 Kg8 99. Kb2 Qe8 100. Qf2 Qe7 101. Qd2 Qe8 102. Bd3 Qe7
103. Be2 Qe8 104. Rad1 Qe7 105. Rc1 Qe8 106. Bf3 Qe7 107. Qf2
Qe8 108. Rcd1 Qe7 109. Be2 Re4 110. Bd3 Qe6 111. Bxe4 fxe4
112. Ra1 Nf5 113. Kb3 Kf8 114. Rh1 Ke8 115. Rh2 Kd7 116. Qe1
Kd8 117. Rd1 Kd7 118. Rc2 Kd8 119. Qf2 Nd6 120. Ka2 Qf5
121. Rh1 Kd7 122. Qg3 Ke6 123. Qh3 Ke7 124. Qxf5 Nxf5 125. Rh3
Ke6 126. Kb3 Bc7 127. Re2 Bb8 128. Re1 Bc7 129. Ra1 Bb8
130. Rd1 Bc7 131. Re1 Bb8 132. Re2 Bc7 133. Rg2 Bb8 134. Rg1
Bc7 135. Rb1 Bb8 136. Rbh1 Bc7 137. Rg1 Bb8 138. Kb2 Bc7
139. Kc2 Bb8 140. Kd2 Bc7 141. Rh2 Bb8 142. Rc1 Bc7 143. Ra1
Bb8 144. Ke2 Bc7 145. Rg1 Bb8 146. Rhh1 Bc7 147. Kd2 Bb8
148. Rc1 Bc7 149. Rh3 Bb8 150. Ra1 Bc7 151. Rhh1 Bb8 152. Rae1
Bc7 153. Rh2 Bb8 154. Rh3 Bc7 155. Ra1 Bb8 156. Kc2 Bc7
157. Rf1 Bb8 158. Kb3 Bc7 159. Rf2 Bb8 160. Kc2 Bc7 161. Rg2
Bb8 162. Kd2 Bc7 163. Rh1 Bb8 164. Rf2 Bc7 165. Rfh2 Bb8
166. Rd1 Bc7 167. Rf1 Bb8 168. Re1 Bc7 169. Ke2 Bb8 170. Rh3
Bc7 171. Kd2 Bb8 172. Kc2 Bc7 173. Rb1 Bb8 174. c4 dxc4
175. Kb2 Bd6 176. Ka3 Ne7 177. Rb2 Nd5 178. Rg3 Kf5 179. Rb1
Be7 180. Rh3 Bd6 181. Kb2 Be7 182. Re1 Bxb4 183. Re2 Bxa5
184. Kc1 Bb6 185. Kc2 a5 186. Rh1 a4 187. Kc1 a3 188. Rc2 Ba5
189. Rh3 Bb4 190. Re2 Bd6 191. Re1 b4 192. Kb1 b3 193. Rh2 c3
194. Rc2 Bb4 195. Ka1 bxc2 196. Ka2 Nxe3 197. Kb3 Kxf4
198. Rc1 c5 199. dxc5 Bxc5 200. Rh1 Kg3 201. Ra1 Kxh4 202. Rc1
Kxg5 203. Rg1+ Kf4 204. Rh1 g5 205. Ra1 h4 206. Rc1 h3
207. Kxc3 g4 208. Kb3 g3 209. Ka4 g2 210. Kb5 Bd4 211. Ka6 Bb2
212. Ka7 Bxc1 213. Kb7 Bb2 214. Kb8 h2 215. Kb7 f5 216. Kb6
Ke5 217. Kc6 f4 218. Kb5 f3 219. Kb6 a2 220. Kb7 f2 221. Kc8
f1=B 222. Kb7 g1=B 223. Kb8 h1=B 224. Kb7 c1=N 225. Kc6 a1=B
226. Kd7 Nd5 227. Ke8 Ne7 228. Kxe7 Nd3 229. Kf7 Nc5 230. Ke7
Nd7 231. Kxd7 e3 232. Kd8 e2 233. Kc7 e1=B 234. Kd8 Ba5+
235. Ke8 Bd8 236. Kf8 Be7+ 237. Kxe7 Bb5 238. Kf8 Bd5 239. Ke7
Bb6 240. Kf8 Bd8 241. Kg7 Ba3 242. Kh6 Bf8+ 243. Kh5 Bf7+
244. Kg4 Bf1 245. Kg3 Bd4 246. Kg4 Bf2 247. Kf3 Be1 248. Kg4
Bg6 249. Kf3 Bh5+ 250. Ke3 Bh3 251. Kd3 Bg6+ 252. Kc4 Bd7
253. Kb3 Bb5 254. Ka2 Bda5 255. Kb2 Bfb4 256. Ka2 Bec3
257. Kb3 Bbd3 258. Ka4 Bc2+ 259. Kb5 Be8+ 260. Ka6 Bc6
261. Ka7 Bd3 262. Kb8 Bdb5 263. Kc8 Kd6 264. Kb8 Bf6 265. Kc8
Kd5 266. Kb8 Bd6+ 267. Kc8 Bd7+ 268. Kb7 Bd4 269. Ka8 Bac7
270. Kb7 Bdb6 271. Ka8 Bbc6# 0-1

after Stockfish played 35. ... Rg7 it's 5pawns vs R, middle game might
make Morphy proud but Capablanca, Karpov and Rubinstein might laugh
on the endgame play, how a drawn position was lost. There are many
obvious perpetual check lines for white but the engine feels it is winning
and gave up some pawn to create an outside passed pawn until it's too
late to offer a draw.

[d]3q3k/p5r1/8/8/1bB1Q2P/6P1/PPP2P1K/8 w - - 1 36

[White "Houdini 2.0c x64 4CPU"]
[Black "Stockfish 2.2.2 x64 4CPU"]
[Result "0-1"]
[ECO "C45"]
[TimeControl "40/480:40/480:40/480"]
[Termination "normal"]
[PlyCount "236"]

{Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz 3800 MHz W=21.7 plies; 11. 998kN/s;
28.928 TBAs B=24.0 plies; 7.384kN/s} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4
Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. exd5 cxd5 8. O-O Be7 9. Nc3 O-O 10. Bf4 c5
11. Qd2 Be6 12. Rfe1 Rc8 13. Rab1 c4 14. Bf1 Bb4 15. Be5 Ne4 16. Qf4 f5 17.
Rbd1 Qa5 18. g3 Bc5 19. Re2 Rce8 20. h4 h6 21. Kh2 Bf7 22. Nxd5 (22. Qxf5
Nxf2 23. Rd4 Qd8) 22. .. Bh5 23. Rxe4 fxe4 24. Nf6+ (24. Bf6 Bxd1 (24. ..
Qa6) 25. Bxc4 Re6 (25. .. Rf7)) 24. .. gxf6 25. Bxc4+ (25. Bc7 Qa6 26. Rd5)
25. .. Kh7 26. Rd7+ (26. Bxf6 Re7 27. Rd5 (27. Rd7 Qe1 28. Bxe7 (28. Bd5
Rxf6 29. Qxf6) 28. .. Rxf4 29. Bxc5+ Kg6 30. gxf4 Bf3 31. f5+ Kxf5 32.
Rf7+) 27. .. Qb6) 26. .. Re7 27. Bd4 Rxd7 28. Qf5+ Kh8 29. Qxh5 Bb4 30.
Qxh6+ Rh7 31. Bxf6+ Rxf6 32. Qxf6+ Rg7 33. Qh6+ Rh7 34. Qe6 Qd8 35. Qxe4
Rg7 36. a3 Be7 37. c3 Qb6 38. Qf3 Qf6 39. Qh5+ Rh7 40. Qe2 Kg7 41. f4 Rh8
42. Qe4 Rb8 43. Qe2 Kf8 44. h5 Bd6 45. a4 Kg7 46. Bd5 a5 47. Qc2 Rd8 48.
Qe4 Kh6 49. Kg2 Rd7 50. Kf3 Re7 51. Qc4 Kxh5 52. Be4 Kh6 53. Qg8 Rd7 54.
Bc2 Rf7 55. Qg4 Re7 56. Be4 Re8 57. Qd7 Rh8 58. Qa7 Qg7 59. Qb6 Qc7 60. Qd4
Rf8 61. b4 Be5 62. Qd5 Kg7 63. Kg2 Bxc3 64. Qg5+ Kf7 65. bxa5 Qd6 66. Qb5
Ke7 67. a6 Rb8 68. Bb7 Bd4 69. Qg5+ (69. Kf3 Qa3+) 69. .. Qf6 70. Qa5 Ba7
71. Qb4+ Kf7 72. Qc4+ Kf8 73. Qb4+ Kg7 74. Qb5 Rd8 75. Be4 Kf8 76. Bd3 Qe6
77. Be2 Qe4+ 78. Bf3 Qc2+ 79. Kh3 Rd6 80. Qh5 Qc3 81. Be2 Qf6 82. Qg4 Qh8+
83. Kg2 Qd4 84. Qf5+ Rf6 85. Qc8+ Kg7 86. Qb7+ Rf7 87. Qf3 Qc5 88. Qd3 Qg1+
89. Kh3 Qh1+ 90. Kg4 Qc6 91. Qb5 Qe6+ 92. Kf3 Kf8 93. Kg2 Rh7 94. Qb4+ Re7
95. Bf1 Qc6+ 96. Kh2 Qc1 97. Kg2 Qe3 98. Kh3 Qf3 99. Bc4 Qh1+ 100. Kg4 Qh6
101. Bd3 Qc6 102. Kg5 Qd5+ 103. Bf5 Bc5 104. Qb8+ Kg7 105. Kg4 Qd1+ 106.
Kg5 Qxa4 107. Qb1 Bd4 108. Kh4 Qxa6 109. Qd1 Qf6+ 110. Kg4 Qd6 111. Qf1 Kf6
112. Qd3 Re3 113. Qc4 Bc5 114. Qa4 Qd5 115. Qa6+ Bd6 116. Qa1+ Kf7 117.
Qa7+ Re7 118. Qf2 Re8 0-1


after 117. Kxc1 position is left with opposite bishops, yet humans might
wonder how a dead drawn position was lost.


[d]8/8/4Bb1k/7p/5p1p/p4P2/6P1/2K5 b - - 0 117
[White "Octochess r4558 x64 1CPU"]
[Black "Redqueen 1.1.1 x64 1CPU"]
[Result "1-0"]
[ECO "B01"]
[TimeControl "40/480:40/480:40/480"]
[Termination "normal"]
[PlyCount "406"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bg4 {-0.54/21
38} 7. O-O {+0.81/14 11} e6 {-0.50/22 48} 8. h3 {+0.70/16 30} Bxf3
{-0.38/22 57} 9. Qxf3 {+0.66/15 9} Bd6 {-0.45/20 38} 10. Ne4 {+0.95/16 25}
Nxe4 {-0.75/21 29} 11. Qxe4 {+0.83/16 10} Qc7 {-0.73/20 50} 12. Re1
{+1.26/16 29} O-O {-0.60/19 21} 13. Bd3 {+1.18/14 8} g6 {-0.62/21 18} 14.
c3 {+0.94/15 20} Nd7 {-0.52/18 19} 15. Bh6 {+0.96/15 30} Rfe8 {-0.56/18 29}
16. Rad1 {+0.85/15 24} Bf8 {-0.44/17 12} 17. Bd2 {+1.06/13 11} Bg7
{-0.43/17 8} 18. Bc2 {+0.92/14 8} Qb6 {-0.47/16 9} 19. b3 {+0.85/14 13} e5
{-0.36/17 11} 20. dxe5 {+0.82/15 10} Rxe5 {-0.35/17 6} 21. Qh4 {+0.66/15
22} Qc7 {-0.27/17 6} 22. Rxe5 {+0.72/16 24} Bxe5 {-0.43/17 4} 23. Qe7
{+0.70/15 9} Bf6 {-0.40/17 7} 24. Qb4 {+0.59/15 15} Re8 {-0.23/16 6} 25.
Be3 {+0.54/14 10} Be5 {-0.20/17 3} 26. c4 {+0.55/15 14} f5 {-0.17/17 5} 27.
Qd2 {+0.55/14 7} Nf8 {-0.45/18 7} 28. f3 {+0.47/15 18} Bg3 {0.00/15 2} 29.
b4 {+0.54/14 7} Ne6 {+0.18/16 3} 30. c5 {+0.27/14 7} Rd8 {-0.05/17 3} 31.
Qc3 {+0.04/15 5} Rxd1+ {-0.07/18 3} 32. Bxd1 {0.00/16 4} Qg7 {-0.09/18 7}
33. Bd2 {+0.11/16 10} Qd4+ {-0.19/18 2} 34. Qxd4 {+0.17/16 3} Nxd4
{-0.02/21 4} 35. Be3 {+0.19/16 9} Ne6 {-0.04/21 2} 36. Bb3 {0.00/14 3} Kf7
{0.00/19 2} 37. Bf2 {-0.05/14 5} Be5 {+0.05/16 1} 38. Kf1 {-0.17/14 8} Ke7
{+0.13/16 1} 39. Bc4 {-0.16/13 2} Nc7 {+0.12/15} 40. a4 {-0.12/13 3} Bc3
{+0.05/13} 41. Bh4+ {-0.41/17 47} Kd7 {+0.20/25 45} 42. b5 {-0.36/17 25}
Ne6 {+0.65/23 40} 43. Bf2 {-0.34/16 13} Bb4 {+0.51/22 82} 44. Ke2 {-0.45/17
52} f4 {+0.62/22 43} 45. h4 {-0.39/17 24} Ke7 {+0.76/23 19} 46. h5
{-0.50/17 18} gxh5 {+0.93/22 19} 47. Bd3 {-0.48/17 16} cxb5 {+0.98/23 31}
48. c6 {-0.52/18 27} bxc6 {+1.18/22 16} 49. axb5 {-0.45/17 10} Bc5
{+1.14/23 27} 50. Bh4+ {-0.41/17 16} Kf7 {+1.08/20 22} 51. bxc6 {-0.22/16
12} Nd4+ {+1.11/23 14} 52. Kd2 {-0.27/17 31} Bb4+ {+1.14/21 13} 53. Kc1
{-0.38/17 9} Nxc6 {+1.05/20 14} 54. Bg5 {-0.44/16 11} Bd6 {+1.41/20 10} 55.
Kb2 {-0.64/16 24} h6 {+1.39/19 8} 56. Bc4+ {-0.68/16 8} Kg7 {+1.66/21 6}
57. Bh4 {-0.69/16 8} Be7 {+1.53/20 10} 58. Bf2 {-0.56/17 16} Bf6+ {+1.50/20
5} 59. Ka3 {-0.56/16 7} Bd4 {+1.55/21 3} 60. Bh4 {-0.66/16 7} Ne5 {+1.46/22
6} 61. Bb5 {-0.87/16 6} Ng6 {+1.63/23 6} 62. Be1 {-0.90/17 7} Ne7 {+1.48/20
2} 63. Kb3 {-0.75/17 7} Nf5 {+1.62/20 2} 64. Kc4 {-0.67/15 3} Bb6 {+1.48/19
4} 65. Kd3 {-0.84/15 6} Kf7 {+1.48/18 1} 66. Bc4+ {-0.92/17 14} Kg6
{+1.80/17 1} 67. Be6 {-0.75/16 5} Ne3 {+1.65/19 2} 68. Bh3 {-0.84/15 4} a5
{+1.59/18 1} 69. Ke4 {-0.85/15 3} Bc7 {+1.84/18 2} 70. Bc3 {-1.04/16 3} Kf7
{+2.04/20 1} 71. Kd3 {-0.99/16 4} Ke7 {+2.42/18 1} 72. Bg7 {-1.24/14 2} a4
{+2.21/17 1} 73. Kd2 {-1.29/14 4} Bd6 {+2.51/16} 74. Kc1 {-1.33/14 2} Kf7
{+2.55/16} 75. Bc3 {-1.36/15 2} h4 {+2.60/16} 76. Bd4 {-1.29/15 3} Kg6
{+2.47/16 1} 77. Kb2 {-1.24/14 2} Bb4 {+2.48/16} 78. Ka2 {-1.24/15 2} Kg5
{+2.48/17} 79. Be5 {-1.24/14 2} Nc4 {+2.47/15} 80. Bd4 {-1.25/15 2} Bd6
{+2.48/18} 81. Be6 {-1.18/19 34} Ne3 {+2.30/28 53} 82. Bh3 {-1.18/18 24}
Nc2 {+2.43/27 62} 83. Bh8 {-1.17/18 20} h5 {+2.39/25 42} 84. Kb1 {-1.19/20
39} Ne3 {+2.29/25 28} 85. Bd4 {-1.18/19 17} Kg6 {+2.25/25 40} 86. Kb2
{-1.19/18 17} Be7 {+2.21/24 40} 87. Kc1 {-1.21/19 51} Ba3+ {+2.23/25 29}
88. Kb1 {-1.20/19 12} Bb4 {+2.23/25 16} 89. Be5 {-1.09/19 44} Kg5 {+2.22/25
16} 90. Ka2 {-1.11/18 13} Nd1 {+2.09/24 21} 91. Bc7 {-1.08/18 17} Be7
{+2.12/25 14} 92. Be5 {-1.14/17 8} Ne3 {+2.13/24 9} 93. Bd4 {-1.13/17 9}
Nd5 {+2.27/23 13} 94. Be6 {-1.11/18 23} Nb4+ {+2.16/23 9} 95. Kb1 {-1.11/17
9} a3 {+2.14/23 13} 96. Be5 {-1.94/18 24} Nd3 {+2.16/23 7} 97. Bd4
{-1.11/16 10} Bf6 {+2.31/22 7} 98. Bb6 {-1.06/16 4} Kg6 {+2.28/21 6} 99.
Ba5 {-1.11/16 5} Be7 {+2.25/22 5} 100. Bc3 {-1.02/17 10} Bb4 {+2.27/21 3}
101. Ba1 {-1.06/17 5} Kg5 {+2.23/20 5} 102. Bd4 {-1.07/17 9} Bf8 {+2.36/20
3} 103. Bc3 {-1.06/15 5} Nb4 {+2.07/20 2} 104. Be1 {-1.06/17 8} Nc6
{+2.10/19 1} 105. Ka2 {-1.20/16 4} Nd4 {+2.15/19 2} 106. Bc8 {-1.48/15 2}
Bd6 {+1.93/17 1} 107. Ba5 {-1.29/17 8} Nf5 {+1.95/18 2} 108. Bc3 {-1.00/16
4} Ne3 {+1.91/22 2} 109. Bh3 {-0.98/16 2} Nf1 {+1.88/21 1} 110. Kb3
{-0.99/16 4} Ng3 {+2.08/20 1} 111. Be6 {-0.98/16 3} Ne2 {+2.04/21 1} 112.
Bg7 {-1.47/16 5} Bc5 {+2.03/19} 113. Kc4 {-1.67/16 5} Be7 {+1.96/21 2} 114.
Kb3 {-1.56/16 2} Nc1+ {+2.45/21 1} 115. Kc2 {-1.73/18 2} Bf6 {+2.50/23 1}
116. Bh6+ {-2.10/19 2} Kxh6 {+2.73/18} 117. Kxc1 {-1.94/19 1} Be7
{+2.69/20} 118. Bd7 {-1.73/19 2} Bb4 {+2.69/20} 119. Kb1 {-1.73/20 1} Kg6
{+2.67/18} 120. Ka2 {-1.73/20 1} Kf7 {+2.67/19} 121. Bc6 {-1.73/24 34} Bc5
{+2.39/36 58} 122. Bd7 {-1.85/24 24} Kf6 {+2.45/37 64} 123. Kb3 {-2.06/24
23} Ke5 {+2.46/36 38} 124. Be8 {-1.88/25 43} Kd4 {+2.42/37 81} 125. Bxh5
{-1.37/23 12} Ke3 {+2.41/37 20} 126. Bg4 {-1.40/24 22} Kf2 {+2.40/39 20}
127. Bh3 {-1.40/25 17} Ke1 {+2.41/38 24} 128. Ka2 {-1.40/25 28} Bd6
{+2.46/36 14} 129. Bg4 {-1.40/25 19} Kf2 {+2.31/34 40} 130. Bh3 {-1.40/25
11} Be7 {+2.38/36 10} 131. Kb3 {-1.40/25 15} Bc5 {+2.39/36 11} 132. Ka2
{-1.40/25 13} Ke3 {+2.40/34 12} 133. Kb3 {-1.40/24 11} Bf8 {+2.33/33 7}
134. Ka2 {-1.40/24 10} Kd3 {+2.39/34 7} 135. Be6 {-1.40/24 10} Kc3
{+2.45/34 8} 136. Bb3 {-1.40/26 15} Bd6 {+2.39/33 4} 137. Bd5 {-1.40/25 6}
Bb4 {+2.54/32 6} 138. Bg8 {-1.40/25 10} Kd3 {+2.32/30 5} 139. Kb3 {-1.40/24
9} Bc5 {+2.41/30 4} 140. Bh7+ {-1.30/23 5} Ke3 {+2.41/29 3} 141. Bf5
{-1.30/23 6} Bd6 {+2.38/30 3} 142. Bd7 {-1.30/23 10} Kf2 {+2.38/31 2} 143.
Bh3 {-1.30/23 7} Be7 {+2.37/30 2} 144. Kc3 {-1.30/23 7} Bb4+ {+2.50/28 4}
145. Kb3 {-1.30/23 4} Ke2 {+2.35/27 1} 146. Bd7 {-1.30/23 6} Kf1 {+2.28/25
1} 147. Bh3 {-1.30/23 5} Ke1 {+2.31/28 2} 148. Bc8 {-1.30/24 7} Bf8
{+2.34/27 1} 149. Bh3 {-1.30/24 5} Kf2 {+2.40/27 1} 150. Kc3 {-1.30/23 5}
Ke3 {+2.30/27 1} 151. Bf5 {-1.30/23 5} Ke2 {+2.30/25 1} 152. Kb3 {-1.30/23
4} Bc5 {+2.25/27 1} 153. Ka2 {-1.30/22 3} Kd2 {+2.25/28 1} 154. Kb3
{-1.30/23 3} Bd6 {+2.23/25} 155. Be6 {-1.30/23 3} Ke2 {+2.24/26 1} 156. Bc8
{-1.30/23 4} Kf1 {+2.45/25} 157. Bh3 {-1.30/23 3} Kg1 {+2.33/26} 158. Kc2
{-1.30/24 5} Be5 {+2.29/26} 159. Kb3 {-1.10/22 2} Bb2 {+2.24/24} 160. Ka2
{-1.23/22 3} Kf2 {+2.27/19} 161. Kb3 {-1.23/25 22} Bc1 {+1.76/34 207} 162.
Ka2 {-1.02/26 28} Ke1 {+0.31/37 34} 163. Bf5 {-1.02/25 20} Bb2 {+0.38/36
40} 164. Kb3 {-1.02/25 24} Ke2 {+0.29/37 44} 165. Ka2 {-1.02/25 22} h3
{+1.01/34 24} 166. Bxh3 {-0.35/25 17} Kf2 {+0.88/35 19} 167. Kb3 {-0.35/26
14} Kg3 {+0.85/35 12} 168. Ka2 {-0.35/28 23} Bc1 {+0.82/35 10} 169. Kb3
{-0.29/28 30} Kf2 {+0.76/34 9} 170. Ka2 {-0.28/27 16} Ke3 {+0.73/31 7} 171.
Be6 {-0.28/26 13} Bb2 {+0.90/31 7} 172. Bf5 {-0.28/26 12} Kd2 {+0.74/32 8}
173. Kb3 {-0.28/26 16} Ke2 {+0.73/29 4} 174. Bg4 {-0.28/26 11} Kd3
{+0.70/30 6} 175. Bf5+ {-0.28/26 14} Kd4 {+0.67/29 5} 176. Bd7 {-0.28/26
12} Ke5 {+0.68/29 3} 177. Be8 {0.00/25 12} Kd5 {+0.68/28 3} 178. Bf7+
{-0.08/25 11} Kc5 {+0.63/26 3} 179. Be6 {-0.08/26 10} Kd6 {+0.64/28 2} 180.
Bg8 {-0.08/26 10} Ke5 {+0.49/27 2} 181. Kb4 {-0.08/25 9} Kf5 {+0.58/27 2}
182. Bc4 {0.00/23 5} Kg5 {+0.69/27 2} 183. Kb3 {0.00/24 9} Kh4 {+0.54/27 1}
184. Be6 {0.00/26 8} Kh5 {+0.57/26 1} 185. Bf5 {0.00/25 8} Kh6 {+0.50/24 1}
186. Bd3 {0.00/26 7} Kg7 {+0.51/26 1} 187. Bc4 {0.00/25 5} Kf6 {+0.49/25 1}
188. Bg8 {0.00/25 5} Kf5 {+0.50/25 1} 189. Bd5 {0.00/25 9} Ke5 {+0.51/24}
190. Bc4 {0.00/26 5} Kd4 {+0.49/24 2} 191. Bg8 {0.00/26 5} Kd3 {+1.02/22 1}
192. Bc4+ {0.00/25 5} Kd2 {+0.86/23 1} 193. Be6 {0.00/24 6} Bc1 {+0.72/24
1} 194. Bg4 {0.00/24 4} Ke1 {+0.73/22} 195. Bf5 {0.00/24 3} Kf2 {+0.93/20}
196. Bh3 {0.00/24 3} Bb2 {+0.97/18} 197. Ka2 {0.00/25 3} Ba1 198. Kxa1
{+6.59/26 3} a2 199. Kxa2 {+6.94/26 4} Ke1 200. Kb3 {+7.31/22 3} Kd1 201.
g4 {+12.26/22 46} fxg3 {-M17/31 310} 202. f4 {+M16/2} Ke2 {-M14/28 34} 203.
f5 {+M15/12} Kf2 {-M13/25 29 1-0 Arena Entscheidung} 1-0

[Guenther]

I don't know the reason for this funny draws, maybe these engines are
TOO optimistic, or maybe a proof that eval can be further tuned, or in
case of the second game posted below, kingsafety code in endgame
made the engine think it has advantage until it's too late to save the
game.

...snip...

after 117. Kxc1 position is left with opposite bishops, yet humans might
wonder how a dead drawn position was lost.


[d]8/8/4Bb1k/7p/5p1p/p4P2/6P1/2K5 b - - 0 117
[White "Octochess r4558 x64 1CPU"]
[Black "Redqueen 1.1.1 x64 1CPU"]
[Result "1-0"]
[ECO "B01"]
[TimeControl "40/480:40/480:40/480"]
[Termination "normal"]
[PlyCount "406"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bg4 {-0.54/21
38} 7. O-O {+0.81/14 11} e6 {-0.50/22 48} 8. h3 {+0.70/16 30} Bxf3
{-0.38/22 57} 9. Qxf3 {+0.66/15 9} Bd6 {-0.45/20 38} 10. Ne4 {+0.95/16 25}
Nxe4 {-0.75/21 29} 11. Qxe4 {+0.83/16 10} Qc7 {-0.73/20 50} 12. Re1
{+1.26/16 29} O-O {-0.60/19 21} 13. Bd3 {+1.18/14 8} g6 {-0.62/21 18} 14.
c3 {+0.94/15 20} Nd7 {-0.52/18 19} 15. Bh6 {+0.96/15 30} Rfe8 {-0.56/18 29}
16. Rad1 {+0.85/15 24} Bf8 {-0.44/17 12} 17. Bd2 {+1.06/13 11} Bg7
{-0.43/17 8} 18. Bc2 {+0.92/14 8} Qb6 {-0.47/16 9} 19. b3 {+0.85/14 13} e5
{-0.36/17 11} 20. dxe5 {+0.82/15 10} Rxe5 {-0.35/17 6} 21. Qh4 {+0.66/15
22} Qc7 {-0.27/17 6} 22. Rxe5 {+0.72/16 24} Bxe5 {-0.43/17 4} 23. Qe7
{+0.70/15 9} Bf6 {-0.40/17 7} 24. Qb4 {+0.59/15 15} Re8 {-0.23/16 6} 25.
Be3 {+0.54/14 10} Be5 {-0.20/17 3} 26. c4 {+0.55/15 14} f5 {-0.17/17 5} 27.
Qd2 {+0.55/14 7} Nf8 {-0.45/18 7} 28. f3 {+0.47/15 18} Bg3 {0.00/15 2} 29.
b4 {+0.54/14 7} Ne6 {+0.18/16 3} 30. c5 {+0.27/14 7} Rd8 {-0.05/17 3} 31.
Qc3 {+0.04/15 5} Rxd1+ {-0.07/18 3} 32. Bxd1 {0.00/16 4} Qg7 {-0.09/18 7}
33. Bd2 {+0.11/16 10} Qd4+ {-0.19/18 2} 34. Qxd4 {+0.17/16 3} Nxd4
{-0.02/21 4} 35. Be3 {+0.19/16 9} Ne6 {-0.04/21 2} 36. Bb3 {0.00/14 3} Kf7
{0.00/19 2} 37. Bf2 {-0.05/14 5} Be5 {+0.05/16 1} 38. Kf1 {-0.17/14 8} Ke7
{+0.13/16 1} 39. Bc4 {-0.16/13 2} Nc7 {+0.12/15} 40. a4 {-0.12/13 3} Bc3
{+0.05/13} 41. Bh4+ {-0.41/17 47} Kd7 {+0.20/25 45} 42. b5 {-0.36/17 25}
Ne6 {+0.65/23 40} 43. Bf2 {-0.34/16 13} Bb4 {+0.51/22 82} 44. Ke2 {-0.45/17
52} f4 {+0.62/22 43} 45. h4 {-0.39/17 24} Ke7 {+0.76/23 19} 46. h5
{-0.50/17 18} gxh5 {+0.93/22 19} 47. Bd3 {-0.48/17 16} cxb5 {+0.98/23 31}
48. c6 {-0.52/18 27} bxc6 {+1.18/22 16} 49. axb5 {-0.45/17 10} Bc5
{+1.14/23 27} 50. Bh4+ {-0.41/17 16} Kf7 {+1.08/20 22} 51. bxc6 {-0.22/16
12} Nd4+ {+1.11/23 14} 52. Kd2 {-0.27/17 31} Bb4+ {+1.14/21 13} 53. Kc1
{-0.38/17 9} Nxc6 {+1.05/20 14} 54. Bg5 {-0.44/16 11} Bd6 {+1.41/20 10} 55.
Kb2 {-0.64/16 24} h6 {+1.39/19 8} 56. Bc4+ {-0.68/16 8} Kg7 {+1.66/21 6}
57. Bh4 {-0.69/16 8} Be7 {+1.53/20 10} 58. Bf2 {-0.56/17 16} Bf6+ {+1.50/20
5} 59. Ka3 {-0.56/16 7} Bd4 {+1.55/21 3} 60. Bh4 {-0.66/16 7} Ne5 {+1.46/22
6} 61. Bb5 {-0.87/16 6} Ng6 {+1.63/23 6} 62. Be1 {-0.90/17 7} Ne7 {+1.48/20
2} 63. Kb3 {-0.75/17 7} Nf5 {+1.62/20 2} 64. Kc4 {-0.67/15 3} Bb6 {+1.48/19
4} 65. Kd3 {-0.84/15 6} Kf7 {+1.48/18 1} 66. Bc4+ {-0.92/17 14} Kg6
{+1.80/17 1} 67. Be6 {-0.75/16 5} Ne3 {+1.65/19 2} 68. Bh3 {-0.84/15 4} a5
{+1.59/18 1} 69. Ke4 {-0.85/15 3} Bc7 {+1.84/18 2} 70. Bc3 {-1.04/16 3} Kf7
{+2.04/20 1} 71. Kd3 {-0.99/16 4} Ke7 {+2.42/18 1} 72. Bg7 {-1.24/14 2} a4
{+2.21/17 1} 73. Kd2 {-1.29/14 4} Bd6 {+2.51/16} 74. Kc1 {-1.33/14 2} Kf7
{+2.55/16} 75. Bc3 {-1.36/15 2} h4 {+2.60/16} 76. Bd4 {-1.29/15 3} Kg6
{+2.47/16 1} 77. Kb2 {-1.24/14 2} Bb4 {+2.48/16} 78. Ka2 {-1.24/15 2} Kg5
{+2.48/17} 79. Be5 {-1.24/14 2} Nc4 {+2.47/15} 80. Bd4 {-1.25/15 2} Bd6
{+2.48/18} 81. Be6 {-1.18/19 34} Ne3 {+2.30/28 53} 82. Bh3 {-1.18/18 24}
Nc2 {+2.43/27 62} 83. Bh8 {-1.17/18 20} h5 {+2.39/25 42} 84. Kb1 {-1.19/20
39} Ne3 {+2.29/25 28} 85. Bd4 {-1.18/19 17} Kg6 {+2.25/25 40} 86. Kb2
{-1.19/18 17} Be7 {+2.21/24 40} 87. Kc1 {-1.21/19 51} Ba3+ {+2.23/25 29}
88. Kb1 {-1.20/19 12} Bb4 {+2.23/25 16} 89. Be5 {-1.09/19 44} Kg5 {+2.22/25
16} 90. Ka2 {-1.11/18 13} Nd1 {+2.09/24 21} 91. Bc7 {-1.08/18 17} Be7
{+2.12/25 14} 92. Be5 {-1.14/17 8} Ne3 {+2.13/24 9} 93. Bd4 {-1.13/17 9}
Nd5 {+2.27/23 13} 94. Be6 {-1.11/18 23} Nb4+ {+2.16/23 9} 95. Kb1 {-1.11/17
9} a3 {+2.14/23 13} 96. Be5 {-1.94/18 24} Nd3 {+2.16/23 7} 97. Bd4
{-1.11/16 10} Bf6 {+2.31/22 7} 98. Bb6 {-1.06/16 4} Kg6 {+2.28/21 6} 99.
Ba5 {-1.11/16 5} Be7 {+2.25/22 5} 100. Bc3 {-1.02/17 10} Bb4 {+2.27/21 3}
101. Ba1 {-1.06/17 5} Kg5 {+2.23/20 5} 102. Bd4 {-1.07/17 9} Bf8 {+2.36/20
3} 103. Bc3 {-1.06/15 5} Nb4 {+2.07/20 2} 104. Be1 {-1.06/17 8} Nc6
{+2.10/19 1} 105. Ka2 {-1.20/16 4} Nd4 {+2.15/19 2} 106. Bc8 {-1.48/15 2}
Bd6 {+1.93/17 1} 107. Ba5 {-1.29/17 8} Nf5 {+1.95/18 2} 108. Bc3 {-1.00/16
4} Ne3 {+1.91/22 2} 109. Bh3 {-0.98/16 2} Nf1 {+1.88/21 1} 110. Kb3
{-0.99/16 4} Ng3 {+2.08/20 1} 111. Be6 {-0.98/16 3} Ne2 {+2.04/21 1} 112.
Bg7 {-1.47/16 5} Bc5 {+2.03/19} 113. Kc4 {-1.67/16 5} Be7 {+1.96/21 2} 114.
Kb3 {-1.56/16 2} Nc1+ {+2.45/21 1} 115. Kc2 {-1.73/18 2} Bf6 {+2.50/23 1}
116. Bh6+ {-2.10/19 2} Kxh6 {+2.73/18} 117. Kxc1 {-1.94/19 1} Be7
{+2.69/20} 118. Bd7 {-1.73/19 2} Bb4 {+2.69/20} 119. Kb1 {-1.73/20 1} Kg6
{+2.67/18} 120. Ka2 {-1.73/20 1} Kf7 {+2.67/19} 121. Bc6 {-1.73/24 34} Bc5
{+2.39/36 58} 122. Bd7 {-1.85/24 24} Kf6 {+2.45/37 64} 123. Kb3 {-2.06/24
23} Ke5 {+2.46/36 38} 124. Be8 {-1.88/25 43} Kd4 {+2.42/37 81} 125. Bxh5
{-1.37/23 12} Ke3 {+2.41/37 20} 126. Bg4 {-1.40/24 22} Kf2 {+2.40/39 20}
127. Bh3 {-1.40/25 17} Ke1 {+2.41/38 24} 128. Ka2 {-1.40/25 28} Bd6
{+2.46/36 14} 129. Bg4 {-1.40/25 19} Kf2 {+2.31/34 40} 130. Bh3 {-1.40/25
11} Be7 {+2.38/36 10} 131. Kb3 {-1.40/25 15} Bc5 {+2.39/36 11} 132. Ka2
{-1.40/25 13} Ke3 {+2.40/34 12} 133. Kb3 {-1.40/24 11} Bf8 {+2.33/33 7}
134. Ka2 {-1.40/24 10} Kd3 {+2.39/34 7} 135. Be6 {-1.40/24 10} Kc3
{+2.45/34 8} 136. Bb3 {-1.40/26 15} Bd6 {+2.39/33 4} 137. Bd5 {-1.40/25 6}
Bb4 {+2.54/32 6} 138. Bg8 {-1.40/25 10} Kd3 {+2.32/30 5} 139. Kb3 {-1.40/24
9} Bc5 {+2.41/30 4} 140. Bh7+ {-1.30/23 5} Ke3 {+2.41/29 3} 141. Bf5
{-1.30/23 6} Bd6 {+2.38/30 3} 142. Bd7 {-1.30/23 10} Kf2 {+2.38/31 2} 143.
Bh3 {-1.30/23 7} Be7 {+2.37/30 2} 144. Kc3 {-1.30/23 7} Bb4+ {+2.50/28 4}
145. Kb3 {-1.30/23 4} Ke2 {+2.35/27 1} 146. Bd7 {-1.30/23 6} Kf1 {+2.28/25
1} 147. Bh3 {-1.30/23 5} Ke1 {+2.31/28 2} 148. Bc8 {-1.30/24 7} Bf8
{+2.34/27 1} 149. Bh3 {-1.30/24 5} Kf2 {+2.40/27 1} 150. Kc3 {-1.30/23 5}
Ke3 {+2.30/27 1} 151. Bf5 {-1.30/23 5} Ke2 {+2.30/25 1} 152. Kb3 {-1.30/23
4} Bc5 {+2.25/27 1} 153. Ka2 {-1.30/22 3} Kd2 {+2.25/28 1} 154. Kb3
{-1.30/23 3} Bd6 {+2.23/25} 155. Be6 {-1.30/23 3} Ke2 {+2.24/26 1} 156. Bc8
{-1.30/23 4} Kf1 {+2.45/25} 157. Bh3 {-1.30/23 3} Kg1 {+2.33/26} 158. Kc2
{-1.30/24 5} Be5 {+2.29/26} 159. Kb3 {-1.10/22 2} Bb2 {+2.24/24} 160. Ka2
{-1.23/22 3} Kf2 {+2.27/19} 161. Kb3 {-1.23/25 22} Bc1 {+1.76/34 207} 162.
Ka2 {-1.02/26 28} Ke1 {+0.31/37 34} 163. Bf5 {-1.02/25 20} Bb2 {+0.38/36
40} 164. Kb3 {-1.02/25 24} Ke2 {+0.29/37 44} 165. Ka2 {-1.02/25 22} h3
{+1.01/34 24} 166. Bxh3 {-0.35/25 17} Kf2 {+0.88/35 19} 167. Kb3 {-0.35/26
14} Kg3 {+0.85/35 12} 168. Ka2 {-0.35/28 23} Bc1 {+0.82/35 10} 169. Kb3
{-0.29/28 30} Kf2 {+0.76/34 9} 170. Ka2 {-0.28/27 16} Ke3 {+0.73/31 7} 171.
Be6 {-0.28/26 13} Bb2 {+0.90/31 7} 172. Bf5 {-0.28/26 12} Kd2 {+0.74/32 8}
173. Kb3 {-0.28/26 16} Ke2 {+0.73/29 4} 174. Bg4 {-0.28/26 11} Kd3
{+0.70/30 6} 175. Bf5+ {-0.28/26 14} Kd4 {+0.67/29 5} 176. Bd7 {-0.28/26
12} Ke5 {+0.68/29 3} 177. Be8 {0.00/25 12} Kd5 {+0.68/28 3} 178. Bf7+
{-0.08/25 11} Kc5 {+0.63/26 3} 179. Be6 {-0.08/26 10} Kd6 {+0.64/28 2} 180.
Bg8 {-0.08/26 10} Ke5 {+0.49/27 2} 181. Kb4 {-0.08/25 9} Kf5 {+0.58/27 2}
182. Bc4 {0.00/23 5} Kg5 {+0.69/27 2} 183. Kb3 {0.00/24 9} Kh4 {+0.54/27 1}
184. Be6 {0.00/26 8} Kh5 {+0.57/26 1} 185. Bf5 {0.00/25 8} Kh6 {+0.50/24 1}
186. Bd3 {0.00/26 7} Kg7 {+0.51/26 1} 187. Bc4 {0.00/25 5} Kf6 {+0.49/25 1}
188. Bg8 {0.00/25 5} Kf5 {+0.50/25 1} 189. Bd5 {0.00/25 9} Ke5 {+0.51/24}
190. Bc4 {0.00/26 5} Kd4 {+0.49/24 2} 191. Bg8 {0.00/26 5} Kd3 {+1.02/22 1}
192. Bc4+ {0.00/25 5} Kd2 {+0.86/23 1} 193. Be6 {0.00/24 6} Bc1 {+0.72/24
1} 194. Bg4 {0.00/24 4} Ke1 {+0.73/22} 195. Bf5 {0.00/24 3} Kf2 {+0.93/20}
196. Bh3 {0.00/24 3} Bb2 {+0.97/18} 197. Ka2 {0.00/25 3} Ba1 198. Kxa1
{+6.59/26 3} a2 199. Kxa2 {+6.94/26 4} Ke1 200. Kb3 {+7.31/22 3} Kd1 201.
g4 {+12.26/22 46} fxg3 {-M17/31 310} 202. f4 {+M16/2} Ke2 {-M14/28 34} 203.
f5 {+M15/12} Kf2 {-M13/25 29 1-0 Arena Entscheidung} 1-0

At least for this last game there seems to be an explanation. There is either
a bug in the time management of RedQueen or less likely in the way
the GUI sends the times.
You can see that Black most of the time starts to play in zero! time
(despite always having a rest of more than one minute!) shortly before
another 40 moves session begins.
(...40, ...77 - ...80, ...116 - ...120, ...156 - ...160, ...194! - ...200,
no eval and depth for ...197 - ...200!!)
In the end there wasn't even send depth/score which probably means it
didn't reach depth 3 and played a random move, which blundered a piece.

Guenther

[fern]

As soon as I feel superior, I offer draw. I know that if I keep playing, the bloody program will see a way to extrrincate and give me a mauling.

Resigned regards
Fern